1000+ Electrolysis and Storage Batteries Objective Questions & Answers - 2

Question: 6

A floating battery is one

(A) in which the current in the circuit is fully supplied by the battery

(B) in which battery voltage is equal to charge voltage

(C) which gets charged and discharged simultaneously

(D) which supplies current intermittently and also during off cycle gets charged

Question: 7

In electroplating the current efficiency is usually

(A) 90 to 98%

(B) 80 to 90%

(C) 60 to 70%

(D) 40 to 50%

Question: 8

A cell which is used as a voltage reference source for instrument calibration is

(A) nickel cadmium cell

(B) mercury cadmium cell

(C) solar cell

(D) dry cell

Question: 9

The e.m.f. of a storage battery depends upon

(A) shape of the cell

(B) size of electrodes

(C) nature of electrodes

(D) all of the above

Question: 10

Negative plate of an Edison cell is made of

(A) silver oxide

(B) iron

(C) copper

(D) lead